I've chosen Z-wave as a starting point in familiarizing myself with GNU Radio, FSK, and Manchester encoding.
Thus far I have been able to capture a signal from my Z-wave transmitter, convert it down to base band, and "hear it". At this point I'm trying to come up with A GNU Radio flow graph that can splice the bits into an ASCII stream.
GNU Radio flow graph so far... Only using a quadrature demod.
GRC File: link
GNU Radio FFT plot showing a few peaks.
Scope plot, showing the preamble, data, and what may be a post-amble
Now I just need to figure out what flow graph I need to decode the bits!